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You will likely need to edit the original templates. With 2.5 the normal process of cloning templates has been removed. Someone else can chime in that is more aware of the proper process but my understanding is that editing/cloning templates with xoops was in essence removed with 2.5. (Depreciated was the term used but normally depreciated means they are still supported but will be removed later. )
I think they removed them from the database and you now have them in the theme folder. If you have more than one theme available you will have to change them in each theme.
Or just change the original template set in the modules themselves by hand.
They were removed because that "feature" at this time is not supported in XE as I understand it.
Attending College working towards Bachelors in Software Engineering and Network Security.